spring Component 源码
spring Component 代码
文件路径：/spring-context/src/main/java/org/springframework/stereotype/Component.java
/*
* Copyright 2002-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.stereotype;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Indicates that an annotated class is a "component".
* Such classes are considered as candidates for auto-detection
* when using annotation-based configuration and classpath scanning.
*
* <p>Other class-level annotations may be considered as identifying
* a component as well, typically a special kind of component:
* e.g. the {@link Repository @Repository} annotation or AspectJ's
* {@link org.aspectj.lang.annotation.Aspect @Aspect} annotation.
*
* @author Mark Fisher
* @since 2.5
* @see Repository
* @see Service
* @see Controller
* @see org.springframework.context.annotation.ClassPathBeanDefinitionScanner
*/
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Indexed
public @interface Component {
/**
* The value may indicate a suggestion for a logical component name,
* to be turned into a Spring bean in case of an autodetected component.
* @return the suggested component name, if any (or empty String otherwise)
*/
String value() default "";
}
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